Electric impact wrenches are often the decisive helpers in an emergency situation. With your new tool, you can change your tyres on your own in no time. By no longer having to unscrew the nuts and bolts of your tyres manually with a wheel spider, the electric impact wrench saves you a lot of time and energy. Unlike pressure impact wrenches, you don't need a compressor with an electric impact wrench, just a power socket.
With our big electric impact wrench test 2021 we would like to make your decision for the right impact wrench easier. We have compared the electric impact wrench with cable and high voltage, with low voltage and the electric impact wrench with rechargeable battery and listed the respective advantages and disadvantages.
- 1 Weekly newsletter with the best personal finance tips
- 2 Summary
- 3 The Best Electric Impact Wrench: Our Choices
- 4 Buying and evaluation criteria for electric impact wrenches
- 5 Decision: What types of electric impact wrenches are there and which is the right one for me?
- 6 Guide: Frequently asked questions about electric impact wrenches answered in detail
- 6.1 How does an electric impact wrench work?
- 6.2 What are the alternatives to an electric impact wrench?
- 6.3 How can I change my car tyres with an electric impact wrench?
- 6.4 What are the well-known manufacturers of electric impact wrenches?
- 6.5 How much does an electric impact wrench cost?
- 6.6 Can I rent an electric impact wrench?
- An electric impact wrench is an electrically-powered screwdriver that works with impact-like rotary movements.
- Impact wrenches can be divided into three types: those powered by electricity from a socket, those connected to a cigarette lighter and battery-powered impact wrenches.
- The maximum torque is decisive for how much power the tool has. The higher the torque, the stronger the tool and the more comfortable the work can be.
The Best Electric Impact Wrench: Our Choices
Buying and evaluation criteria for electric impact wrenches
In this section, we will show you what criteria you can use to decide between the wide range of electric impact wrenches.
You should consider and compare the following criteria:
In the following, we explain what the different criteria mean and what is important.
Size / weight
Mostly, the problem is that electric impact wrenches are very heavy and unwieldy. However, this is due to the impact and rotary gears.
With smaller and lighter tools, the resistance is lower. Accordingly, these tools are suitable for finer and lighter overhead work. They are also easier to handle and lighter. It should be noted, however, that a small and light device also has a weaker motor.
Large electric impact wrenches with high resistance are mostly used for tedious work. However, the weight and size of the tool should not interfere with the work. Large impact wrenches are mostly used for jobs such as changing tyres.
The intended use is decisive for which tool you should choose.
Torque is the amount of force exerted on a rotating body and is measured in Newton metres.
The higher the speed, the stronger the tool.
In relation to an electric impact wrench, the torque indicates how strongly a screw can be tightened. When buying, make sure that the tightening and loosening torque is specified. Ideally, these torques should be the same and as high as possible.
Electric impact wrenches with adjustable torque have the advantage that, for example, all screws can be tightened evenly. This way you have an overview and can check your work carefully. In addition, wear or break-off of the screws is avoided.
The no-load speed is a physical parameter that indicates the number of revolutions in a certain period of time on electric impact wrenches without offering any resistance. When the electric impact wrench is simply switched on and turning in the user's hand, these revolutions are the idle revolutions. They are measured at one revolution per minute (rpm).
The maximum torque multiplied by the idle speed gives the power in rpm.
When buying an electric impact wrench, it is important to know what kind of power the tool has. The power indicates how much electrical energy the impact wrench converts into mechanical energy in one minute.
The maximum power delivered by the power source is the power rating for electric impact wrenches. This is called the maximum power input. It is higher than the actual power of the electric impact wrench.
When electric energy is converted into mechanical energy, heat is lost, for example. As a result, the power output is lower than the power input from the power source.
The power is expressed in watts (W).
Possible cable length
The length of the cable is a decisive aspect in the selection of a suitable electric impact wrench.
It is crucial that the cable can be passed from the socket to the workplace. This avoids unnecessary extensions and allows you to carry out your work more comfortably.
An electric impact wrench with a short cable can reduce the radius of your workplace. For this reason, experience has shown that the cable should be at least 3 m long. If you are working in a place where there is no power socket, you can buy an extension cord or a cable drum.
If you decide to buy an impact wrench with a rechargeable battery, it is a good idea to find out what the manufacturer says about the battery life.
The battery life indicates the time in which the stored power is delivered. It is important to check the battery level before use. This way you avoid interrupting your work.
Most commercially available impact wrenches with a rechargeable battery have a torque of 24-150 Nm, in contrast to electric impact wrenches. An impact wrench with a rechargeable battery also has the advantage of mobility.
Decision: What types of electric impact wrenches are there and which is the right one for me?
If you want to buy an electric impact wrench, there are three types of products you can choose from.
In the following section, we will differentiate between the three product types and list and explain the respective advantages and disadvantages in more detail.
Guide: Frequently asked questions about electric impact wrenches answered in detail
How does an electric impact wrench work?
Electric impact wrenches can be divided into two main types, battery-powered impact wrenches and mains-powered impact wrenches.
Do not confuse an impact wrench with a drill. The difference is that an impact wrench has an impact function and works with abrupt rotary movements. With an impact wrench, the rotary movement is interrupted at one point and passed on as a vibrating movement. In contrast to a drill, the impact wrench has a much higher torque.
What are the alternatives to an electric impact wrench?
Compressed air wrenches are used to loosen tight screws due to the high torque. Since the tool works without electronics, they have a longer service life than electric impact wrenches.
The impact wrench can be used anywhere without electricity. A compressor with compressed air is required for use. However, this must have the appropriate air supply. Such compressors are available in every workshop. Normal households rarely have such a compressor.
The rigid hose of the air compressor makes your work more difficult. Your movement is restricted. The hose is also difficult to store because of the material.
How can I change my car tyres with an electric impact wrench?
We explain in a few steps how you can change your tyres with an electric impact wrench:
- Pull off the hub cap
- Loosen wheel nuts (make sure your tool is set to unscrew)
- replace the old tyres with new ones
- Tighten the wheel nuts (make sure your tool is set to screw in)
- check with a torque spanner
What are the well-known manufacturers of electric impact wrenches?
The most well-known manufacturers in this category according to comparative studies are:
Which manufacturer you will choose depends on your criteria. Basically, you should decide on a variant of the electric impact wrench. Think about the purpose for which you need your new tool. The manufacturers we have listed are the ones that offer the best buying advice.
How much does an electric impact wrench cost?
|Electric impact wrench with cable and high voltage||approx. 40 - 250 €|
|Electric impact wrench with cable and low voltage||approx. 30 - 150 €|
|Electric impact wrench with battery||approx. 50 - 300 €|
Can I rent an electric impact wrench?
You can also find them on ebay-kleinanzeigen.de. However, when renting from private individuals, you must be aware that these advertisements are location-dependent.
If you have decided to buy an electric impact wrench, take a look at the many rental offers.
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